From 81ae3c3295acc91cd7eafb5057ee255dc69db36d Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@mega-nerd.com>
Date: Tue, 12 Dec 2023 14:48:49 +1100
Subject: [PATCH] scrypt.cabal: Make it unbuildable on arches other that x86_64

The underlying library depends on SSE and related instructions which
are only available on the x86_64 arch.
---
 scrypt.cabal | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/scrypt.cabal b/scrypt.cabal
index b327d66..01a2de0 100644
--- a/scrypt.cabal
+++ b/scrypt.cabal
@@ -36,11 +36,19 @@ source-repository head
 library
     exposed-modules: Crypto.Scrypt
     hs-source-dirs: src
-    build-depends:
-        base == 4.*,
-        base64-bytestring >= 0.1,
-        bytestring >= 0.9,
-        entropy >= 0.2
+
+    if arch(x86_64)
+        build-depends:
+            base == 4.*,
+            base64-bytestring >= 0.1,
+            bytestring >= 0.9,
+            entropy >= 0.2
+    else
+        -- The underlying C library requires SSE and related instructions which
+        -- are only available on x86_64, so we make this unbuildable on other
+        -- arches.
+        build-depends:
+            base < 0
 
     ghc-options: -Wall
     ghc-prof-options: -auto-all